Depending on the set temperature in the passenger compartment, the air passing through the air conditioner cooler is cooled or heated in the heater radiator. On vehicles with a diesel engine, an additional heater is installed to increase the temperature of the coolant.
The heater core is heated by hot coolant. The air heated in the heater radiator is supplied to the passenger compartment.
The temperature of the air supplied to the passenger compartment is regulated by mixing fresh outside air and heated air in the heater using air distribution dampers.
All air distribution dampers are driven by small electric motors.
The removal of air from the passenger compartment occurs through the ventilation openings on both sides of the rear bumper.
If, for example, due to contamination of the outside air, it is necessary to turn off its intake, then the air recirculation mode can be maintained in the passenger compartment, which is switched on by the corresponding button. In this case, only the air in the passenger compartment will be used.
The principle of operation of the air conditioner
The air conditioner works like a refrigerator. The engine-driven compressor compresses the gaseous, environmentally friendly and azon-depleting layer-free freon refrigerant R-134a. As a result, the refrigerant is heated and it enters the cooler, where it is cooled and liquefied. Through the pressure reducing valve, the refrigerant is fed to the evaporator, where the resulting liquid again passes into a gaseous state. In this case, it is strongly cooled. The air drawn in from outside flows around the honeycomb structure of the evaporator and is cooled down. The condensate formed in this case from the moisture contained in the air is removed to the outside.
During engine operation and when the fan is on, cooled air can be supplied to the passenger compartment through the deflectors. The intensity of air cooling in the passenger compartment depends on the set temperature and the rotation speed of the passenger compartment fan.
Attention! Removing the air conditioner and evaporator is allowed only if there is no refrigerant in the circulation system. This work should be done in the workshop.
The air conditioner is equipped with a so-called solar sensor or insolation sensor that reacts to the intensity of sunlight. The sun sensor is located in the center of the instrument panel under the windshield. When the sun is bright, the insolation sensor automatically adjusts the fan speed and thus the volume of air supplied to the passenger compartment via the control unit. Thus, when maintaining the air conditioner in the passenger compartment of the set temperature, the intensity of air heating by the sun's rays is taken into account.
Attention! This manual does not describe how to carry out repairs on the air conditioner. For safety reasons, the repair of the air conditioner should be entrusted to an appropriate workshop.
Attention! Do not open the air conditioner refrigerant circuit. Skin contact with coolant causes frostbite. If refrigerant comes into contact with the skin, immediately rinse the skin with cold water for at least 15 minutes. The refrigerant is colorless, odorless and heavier than air. If a refrigerant leaks, people near the floor where the vehicle is parked or in rooms below the leak may suffocate.
Attention! When performing work in the cabin regarding the air conditioning system, work will be carried out related to the electrical system, it is imperative to disconnect the wire terminal «masses» (-) from the negative pole of the battery. Permanent disconnection of the terminal or wire is considered as work on the electrical system.
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